Estimate the capital value of (a company) at an unreasonably or unlawfully high level(verb)
Overestimate the market value of(verb)
Capitalize beyond what the business or the profit-making prospects warrant(verb)
WordNet. Princeton University. 2010.
Use "overcapitalise" in a sentence
""overcapitalise" its lenders and EBS will need to raise an additional 438 million euros by the end of February to bring its Core Tier 1 capital to 13.5 percent."
"As I said ages ago on this blog: if I choose to renovate my house and overcapitalise as a result, it is my money and I can do what I like."